Hmmm… I am also awkward and clumsy so this is a tough one lol. But I feel like it would depend how far and exactly what kinda thing you wanna do for him. Did you wanna plan a social party for him, or something cute or romantic between the two of you, or something dirty between the two of you? I suppose you could do a mix, you could plan a party for him with his friends, or make him/ buy him something you know he would enjoy. Personally if I had a significant other I could physically be with I would either take him out or make him dinner, or I always had the idea ( if you wanted something more sensual) you could buy lingerie, take a picture of yourself in it, put said picture in a box, wrap it, and surprise him with it, make sure you’re wearing it when you see him open it though.
I’m sorry if I was no help at all, I’ve had little experience with dating people and giving them presents.
Anyone help have other suggestions?